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Table 3 Rasch item fit indices and Cronbach’s alpha if item deleted for the three-dimensional model

From: An alternative to STEBI-A: validation of the T-STEM science scale

Dimension

Item

Cronbach's Alpha if item deleted

Measure

Infit MNSQ

Outfit MNSQ

Personal science teaching efficacy and beliefs

PSTEB_1

.933

− 1.592

1.37

1.15

PSTEB_2

.923

0.207

0.85

0.74

PSTEB_3

.922

0.410

0.80

0.65

PSTEB_4

.921

0.191

0.78

0.60

PSTEB_6

.930

0.221

1.32

1.15

PSTEB_8

.927

0.556

0.94

0.88

PSTEB_9

.924

0.543

0.74

0.72

PSTEB_10

.927

− 0.823

0.84

0.62

PSTEB_11

.936

0.287

1.16

1.37

Science teaching outcome expectancy beliefs

Above− average student interest or performance

STOEB_1

.789

0.314

1.17

1.25

STOEB_3

.721

− 0.124

0.94

0.95

STOEB_7

.731

0.144

0.96

1.00

STOEB_8

.734

− 0.335

0.96

0.98

Neutral or below-average student interest or performance

STOEB_2

.736

− 1.483

1.35

1.35

STOEB_4

.737

− 0.168

1.29

1.27

STOEB_5

.663

0.987

1.09

1.04

STOEB_6

.701

− 0.234

1.12

1.09

STOEB_9

.707

0.897

1.26

1.19

  1. PSTEB_5 and PSTEB_7 were removed based on the prior analysis